All eyes on Fed, Greece after ECB fires bazooka

(Reuters) - After the surprises from central banks which rocked markets at the start of the year, the U.S. Federal Reserve will be watched as closely as ever this week to see that it doesn't stray from its own policy path.

The atmosphere will already be tense as the fallout from Sunday's snap election in Greece settles and concern has grown in some quarters that central banks, which played such a big part in guiding economies through the financial crisis, are becoming less predictable.

The shock of the Swiss National Bank abandoning its cornerstone currency cap had yet to fully subside when the European Central Bank said it would flood markets with over a trillion euros, more than expected, to prevent the euro zone from sliding into deflation.

Canada also cut its rate out of the blue and Denmark did so twice to navigate a world of tumbling oil prices and weak growth.